hummingbird-me/kitsu-server

# frozen_string_literal: true

workers Integer(ENV['WEB_CONCURRENCY'] || 4)
threads_count = Integer(ENV['RAILS_MAX_THREADS'] || 6)
threads 0, threads_count

preload_app!
quiet

port        ENV['PORT'] || 3000
environment ENV['RACK_ENV'] || 'development'

on_worker_boot do
  require 'prometheus_exporter/instrumentation'
  PrometheusExporter::Instrumentation::Process.start(type: 'web')
  PrometheusExporter::Instrumentation::ActiveRecord.start(
    custom_labels: { type: 'web' },
    config_labels: %i[database host]
  )
end

after_worker_boot do
  require 'prometheus_exporter/instrumentation'
  PrometheusExporter::Instrumentation::Puma.start
end

before_fork do
  require 'puma_worker_killer'

  PumaWorkerKiller.config do |config|
    config.rolling_pre_term = ->(worker) {
      puts "Worker #{worker.inspect} being killed by rolling restart"
    }
  end
  PumaWorkerKiller.enable_rolling_restart(6.hours)
end

lowlevel_error_handler do |ex, env|
  Sentry.capture_exception(
    ex,
    message: ex.message,
    extra: { puma: env, culprit: 'Puma' }
  )
  # note the below is just a Rack response
  [500, {}, [<<-MESSAGE.squish]]
    An unknown error has occurred. If you continue to have problems, contact help@kitsu.io\n
  MESSAGE
end